Question

我正在运行程序查询时出现此错误，

java.sql.SQLException：列数不匹配第1行的值计数

但是我不知道为什么，我所有的价值观都在那里并且匹配起来。这是我做我的sql语句的代码。

c = DriverManager.getConnection( url, username, password );


String selectStatement = "INSERT INTO entry ( id, name, title, note) VALUES (?),(?),(?),(?)";
PreparedStatement prepStmt = (PreparedStatement) c.prepareStatement(selectStatement);
prepStmt.setInt(1, idSeed++);
prepStmt.setString(2, name2);
prepStmt.setString(3, title2);
prepStmt.setString(4, note2);
prepStmt.executeUpdate();

Answer 1

您的SQL语法不正确。一定是

INSERT INTO entry ( id, name, title, note) VALUES (?,?,?,?)

Answer 2

请在您的存在代码中进行以下更改

也保持idSeed的价值。

String selectStatement = "INSERT INTO entry ( id, name, title, note) VALUES (?,?,?,?)";
PreparedStatement prepStmt = (PreparedStatement) c.prepareStatement(selectStatement);
prepStmt.setInt(1, idSeed); // remove ++ from here, do it in last
prepStmt.setString(2, name2);
prepStmt.setString(3, title2);
prepStmt.setString(4, note2);
prepStmt.executeUpdate();

Notes entry = new Notes(idSeed, name2, title2,note2 ); //now you will get exactly what inserted into DB table
entries.add(entry);

idSeed++; // now increment it, which will reflect into next iteration...

java.sql.SQLException：列数与第1行的值计数不匹配

2 个答案: